Luke
Acts 17:34BSB·traditional attribution

But some joined him and believed, including Dionysius the Areopagite, a woman named Damaris, and others who were with them.

John Calvin Reformed @genevareformer

34. Among whom was also Dionysius. Seeing that Luke doth name one man and one woman only, it appeareth that there was but a small number of those which believed at the first. For those other of whom he maketh mention remained indifferent; because they did neither wholly despise Paul’s doctrine, neither were they so thoroughly touched, that they joined themselves unto him that they might be his scholars.

Matthew Henry Presbyterian @wholebiblehenry

We have here a short account of the issue of Paul's preaching at Athens. I. Few were the better: the gospel had as little success at Athens as any where; for the pride of the philosophers there, as of the Pharisees at Jerusalem, prejudiced them against the gospel of Christ. 1. Some ridiculed Paul and his preaching.

Commenting on Acts 17:32-34

Albert Barnes Presbyterian @notesbybarnes

Verse 34. Clave unto him. Adhered to him firmly; embraced the Christian religion. Dionysius. Nothing more is certainly known of this man than is here stated. The Areopagite. Connected with the court of Areopagus, but in what way is not known. It is probable that he was one of the judges.